@media screen and (min-width: 320px) {
  html {
    font-size: 21.33px
  }

  body {
    font-size: 12px
  }
}

@media screen and (min-width: 360px) {
  html {
    font-size: 24px
  }

  body {
    font-size: 12px
  }
}

@media screen and (min-width: 375px) {
  html {
    font-size: 25px
  }

  body {
    font-size: 12px
  }
}

@media screen and (min-width: 384px) {
  html {
    font-size: 25.6px
  }

  body {
    font-size: 14px
  }
}

@media screen and (min-width: 400px) {
  html {
    font-size: 26.67px
  }

  body {
    font-size: 14px
  }
}

@media screen and (min-width: 414px) {
  html {
    font-size: 27.6px
  }

  body {
    font-size: 14px
  }
}

@media screen and (min-width: 424px) {
  html {
    font-size: 28.27px
  }

  body {
    font-size: 14px
  }
}

@media screen and (min-width: 480px) {
  html {
    font-size: 32px
  }

  body {
    font-size: 15.36px
  }
}

@media screen and (min-width: 540px) {
  html {
    font-size: 36px
  }

  body {
    font-size: 17.28px
  }
}

@media screen and (min-width: 720px) {
  html {
    font-size: 48px
  }

  body {
    font-size: 23.04px
  }
}

@media screen and (min-width: 750px) {
  html {
    font-size: 50px
  }

  body {
    font-size: 24px
  }
}

.clear-fix:after {
  content: '\0020';
  display: block;
  height: 0;
  clear: both;
  visibility: hidden;
}
body{
  font-family: Arial,Helvetica,STHeiTi,sans-serif;
}


